Musculoskeletal Disorders: Mechanisms of Muscle Contraction Abnormalities

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Questions and Answers

What mechanism can lead to muscle cramps?

  • Dehydration (correct)
  • Excessive energy production
  • Amino acid deficiency
  • Increased calcium flux

Which of the following is a common symptom of muscular dystrophies?

  • Improved motor development
  • Progressive muscle wasting (correct)
  • Joint stiffness
  • Increased muscle strength

What is the role of dystrophin in muscle contraction?

  • Energy production
  • Muscle phagocytosis
  • Joint stabilization
  • Affecting muscle contraction (correct)

Which disorder is genetically transmitted through a recessive gene on the X chromosome?

<p>Limb-girdle muscular dystrophy (B)</p> Signup and view all the answers

What is the primary cause of weakness (loss of strength) in muscles due to disuse?

<p>Atrophy (A)</p> Signup and view all the answers

Which condition can lead to rhabdomyolysis and subsequent renal failure?

<p>Muscle tears releasing myoglobin (B)</p> Signup and view all the answers

What is the classification of Duchenne's muscular dystrophy based on progression?

<p>Rapidly progressing (B)</p> Signup and view all the answers

'Gower's maneuver', seen in muscular dystrophies, refers to:

<p>'Using hands to climb' up the legs to stand up (C)</p> Signup and view all the answers

'Polymyositis' involves inflammation of which part of the body?

<p>Muscle groups (A)</p> Signup and view all the answers

What is the primary cause of fatigue in muscles according to the text?

<p>Lack of energy production (C)</p> Signup and view all the answers

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